Diaphragm-pump.



I 1. c. GORMAN, JR.

DIAPHRAGM PUMP.

APPLICATION FILED MAY 7. I917.

1,296,503. Patented Mar. 4, 1919.

PHI NORRIS PIIIER! 00., FHOTD-LIINOY. WASHING70N. D. C.

JAMES o. com/IAN, sa or MANSFIELD, 01110, ssrcnon. TO THE BARNES MAivuEAc- TUBING COMPANY, or MANSFIELD, OHIO, A CORPORATION or OI-IIO.

" DIAPHRAGM-PUMP.

To all whom it may concern: 7

Be it known that I, JAMES C. GORMAN, Jr., a citizen of the United States, residing at Mansfield, in the county of Richland and State of Ohio, have invented certain new and useful Improvements in Diaphragm- Pumps; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention'relates to improvements in diaphragm pumps and one of the objects thereof is to provide a structure whereby the valve of the pump is assured alift to and from its seat 'in the same direction as the movement imparted to the diaphragm.

Another object of this invention is to provide a structure whereby the valve operating mechanism is protected from foreign matter in the shape of dirt or stones, where by the correct seating of the valve is assured.

Another object of this invention is to provide a structure'whereby the-valve may be removed and repaired or replaced without dismantling any of the cooperating structure of the pump. 7

Another object of the invention is to pro- .vide a structure consistingof the minimum parts, which is cheaply made and which can be easily and quickly assembled.

The invention further comprises novel dc tails of arrangement and combinations of parts that will be more fully hereinafter set forth and pointed out in the following claims.

Referring to the drawings in which similar reference characters indicate corresponding parts, and in which Figure 1 is a section of the improved dlaphragm pump;

Fig. 2 is a plan view of the valve seat casting member, the hollow poststhereof being shown in section; and A Fig. 3 is an elevation of the valve, the stem thereof shown as projecting into the sleeve.

The pump casing comprises lower and upper members 1 and 2 confining periph" erally between them, by any suitable means, such as the bolts 3, the usual rubber diaphragm 4, provided with the central aperture 5. Secured to the top of the upper pump casing 2 in any approved manner 18 a Specification of Letters Patent.

standard 6 provided with a pivotal mountmg 7 for the operating lever 8 which in the present instance has an operatingconnection 9 at its free end adapted to impart to 1t the usual reciprocating movement. Substantially at its center, the lever 8 is provided with a second pivotal connection 10 having an internally threaded cap 11 adapted to have threaded thereinto the tubular valve-stem guide 12 which passes through a hole in a cross-bar or other rigid member of the pump structure or casing and has its lower end firmly secured to a yoke 13 by means of the nuts 14 and 15-; said yoke being secured upon diametrically opposite tubular projections 20, of a casting 16, carried by -the'diaphragm, as hereinafter described.

Patented Mar. 4, 1919.

Application filed May 7, 1917. Serial No. 167,005. 1 i

The rubber diaphragm 41' is held between 7 two disk castings 16 and 17 preferably. of steel, the upper casting 16 being in the form of a disk, and provided with a central opening 18 which registers with the aperture of the diphragm. The'upper flat face of the disk casting 16 has an annular fiange extending around the margin of the opening therein to form a seat 19 for the valve hereinafter described. This disk 16 on its upper face is also provided with two upstanding integraltubular projections or hollow posts 20 through which pass the bolts or other-fastening members 21, the same also extending through the rubber diaphragm, lower clamping disk 17, and the upper yoke 13 and provided on their upper extremities with threaded portions for the reception of nuts 22 whereby the whole is held in assembled relation. Obviously any convenient means may be used for fastening these parts together.

Adapted to rest on the valve-seat 19 is the valve, which may consist of a disk of sheet rubber 23 held between two disk castings 24 and 25 preferably of steel through the center of which passes the steel valve stem 26 adapted to be attached thereto by means of the nut 27 and this stem projects up into the tube 12 thereby allowing a reciprocating movement of the stem in said tube to seat and unseat the valve on the flanged seat 19.

In operation the usual reciprocatory movement given to the rocker lever 8 imparts a corresponding up and down movement to the diaphragm, on the up stroke of which the valve remains seated but upon the reversal of which for its downward strokethe valveis raised by the water in the compartment beneath the diaphragm.

The. construction above set forth assures a free and unrestricted vertical lift of the valve in a substantially straight line and prevents any dirt or stonesfrom affecting the perfect seating of the valve since there are no operating parts or guiding means be.- low the valve seat to obstruct the passageway or on which any foreign mattercarried by the water can lodge there is nothing above or around the valve or the valve stem to obstruct the passage or on which foreign matter is liable to lodge and interfere with the movement and proper seating of the valve.

Moreover, this valve mechanism can be easily removed and without tearing the pump apart, it being only necessary to use Stillson wrench to hold the stem of the valve and loosen the nut thereon with another wrench. The stem may then be pushed downward. far enough to withdraw it from the hollow sleeve, whence the valve can betakenentirely out to replace the rubber face or to, make other repairs.

Having thus described my invention, what I claim as. new and desire to secure by Let ters Patent is;

1, A diaphragm pump comprising a casing having an'elastic diaphragm therein provided with a central opening, a ringshaped castingon said diaphragmhaving a valve seated thereon over said opening, said casting being formed with tubular projections extending upwardly therefrom and having a cross-piece oryoke mounted thereon, and fastening bolts securing said dia-- P ragm. t said a ting an exte through said projections and through said yoke a lever pivoted on said casing, and a tubular valve-stem guide depending from and pivoted at its upper end to said, lever and having itslower end firmly secured to said yoke; said valve having a stem slidably fitted in said guide, substantially as described.

2. A diaphragm pump comprisinga casing having a diaphragm therein provided. with a central" opening, a lever pivoted on said casing and having pivoted thereto and depending. therefrom tubular valve stem g ide, id. guide. car y ng a i sl w r end a y ke. f r tta hmen t a i phr gm v ve sea d over S id ing an jha g a t m idb y tted; n sa guide, an mea f r nne ng nd ec ng said y to said diaphragm with said, guide in vertic l. al nementand nq ntr dw th a QP 60 ing and valve seat. 7 i

3. A diaphragm pump including in combina ion an, operat ng lev r, tube. ep n ng om s id lever and pivote there o. at

i s uppe nd, a ape t red. d aphr gm, a

a ve tr l ng pas agethro gh the penng' a d. aph gm, and provide with a valve-stem slidable in tube, a yoke carri d y said. t be,v and. me ns, or nec ng a dyoke to said. d aphragm, in lnd- 7 ing an aper ur d d sk p ov de wi h a rai d val eea and 10.11%. ups and n arms, both the valve-seat and the arms be.- ng nteg a With, the d sk- Inv timony where f I afiix my gn ture in the presence of two witnesses.

1 JAMES C- GO MAN, J11.

Witnesses: V

B- BARNE E,- G. Gn nnnr.

enie. Q? he r t st mar be btained. r. five cent each, by add e see 99 1mi. 9 9!; eseta Washi 0-. 

